[TunafishE93]

My car was saying it was going 4 mph faster than actual. Was able to get digital read to have the correct speed but until now not the analog. Its saying about .5 mph faster than actual at 70 mph now. He's the instructions for bimmercode app.
Car used, 2012 E93 335I N55 Automatic.

Go into "Instrument Custer".. Mine is "KMBI_PL2".
Go into expert mode
Go into "3002 WEG"
Go into "C08_K_ZAHL_TACHO"
Select "Custom Value"
Input "A4" on top and "61" on bottom
Select "OK"
Go back and select "C08_K_ZAHL_TACHO_KOMPL"
Select "Custom Value"
Input "5B" on top "9E" on bottom
Select "OK"
Go back to "Instrument Custer" menu
Change "Speedometer Correction" and "Digital Speed Correction" to "Active" if not already
Then press "code" on top
Test.

I got these values from another thread which is linked. I am not sure what they mean but worked for me (is still half mile off).

https://www.e90post.com/forums/showthread.php?t=688219

[MadJoe]

I used this on my 2011 328xi and went from 7mph off to only 3, so thank you! I know it isn't perfect, but it's a heck of a lot better than it was.

[MadJoe]

Using your instructions and the spreadsheet found here, I was able to calculate the perfect settings for my car and now have a speedometer that agrees with my GPS!

This thread should be stickied, the link I provided has instructions for doing this via NCS Expert so you don't have to have the Bimmercode app.

[nsjames]

perfekt toolbox makes this remarkably easy if you already have a PC inpa setup.

[MadJoe]

Originally Posted by nsjames

perfekt toolbox makes this remarkably easy if you already have a PC inpa setup.

I can't find a download for that that doesn't require me to make an account with the website, nor can I easily find instructions on how to use it. I'm going to stick with using the Bimmercode app (since I paid for the licenses) and continue to point people to the instructions and spreadsheet for NCS Expert that I linked for the time being.

[nsjames]

https://www.drive2.com/l/496203276497191008/

[colorado.e9x]

Will this work with the digital cruise control readout? Every time I set it I notice its ahead by 3mph

[MadJoe]

Originally Posted by colorado.e9x

Will this work with the digital cruise control readout? Every time I set it I notice its ahead by 3mph

My cruise control shows the same speed as my speedometer, but it was never off from that to begin with. Not sure if it will correct it.

[colorado.e9x]

Just finished up doing this and I'm glad to say that it fixed everything including the cruise control 🙏🏼

[Chriscabob]

Thanks! E92 2010 is now accurate